William polley



(No Model.) 7

W. POLLEY.

BOILER CLEANER.

No. 457,749. Patented Aug. 11, 1891.

UNITED STATES PATENT OFFICE.

IVILLIAM FOLL EY, OF CORTLAND, NEW YORK, ASSIGNOR OF ONE-HALF TO ALEXANDER M. DUFFY, OF SAME PLACE.

BOlLER-O LEAN ER.

SPECIFICATION forming part of Letters Patent h To. 457,749, dated August 11, ,1891.

' Application filed May 2,1891. Serial No. 391,384. (No model.)

To all whom it may concern."

Be it known that I, WILLIAM POLLEY, a. citizen of the United States, residing at Cortland, in the county of Cortland and State of New York, havev invented certain new and useful Improvements in Boiler-Cleaners; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to certain new and useful improvements in boilercleaners; and it has for its object to free the feed-water before entering the boiler from all impurities-such as lime, magnesia, &c.and thereby prevent scale or incrustation of the boiler. This object is accomplished by the mechanism illustrated in the accompanying drawings, which forms a part of this specification; and it consists of a seriesof open pans (three or more in number) situated in the upper part or steam-space of the boiler, one endpan being provided with a feed-water pipe and the other end pan with a blow-ofi pipe, as will be hereinafter more fully described, and specifically set forth in the claims.

In the drawings, Figure 1 represents a side elevation of a boiler, partly broken away to show the location of my improved device Fig. 2, a perspective view of the pans; Fig. 3, a top plan view of the same, and Fig. 4 a crosssection on line a: a: of Fig. 8.

Similar letters of reference indicate like parts throughout the several views.

The letter A indicates the boiler, and b b the tubes thereof. Mounted in the upper part of the boiler upon supports 0 C, resting upon cross-pieces D D, secured to the upper row of tubes, are three pansE E E connected together and extendinglengthwise theboiler. For convenience sake, in future reference to these pans the pan E will be designated as the precipitate-pan and the pans E E as the retarder-pans. The retarder-pans are provided with a series of retarder-wings e e e e,which extend at an angle of about eighty degrees nearly across the width of the pans and from opposite sides. thereof. The top edge of each wing curves downward toward its free end, as shown at c and the series on one side alternates with that on the other side, so that the flow of water will be around into the end retarder-pan to within a short distance of its bottom.

G is a blow-oif pipe, its inner end being slightly curved and in close proximity to the bottom of the precipitatepan. Its outer end is provided with a blow-off valve H.

The precipitate-pan is provided with an overflowI, which is constructed as follows: In the bottom of the precipitate-pan is made an opening 1 of any desired shape, said opening being surrounded by a wall or lining 11, provided with a corrugated cap 1?, which projects slightly inward to prevent the water in overflowing from running down the side of the wall or lining. The object of the overflow is twofold. It serves as an outlet for the water into the water-space of the boiler and to give a greater amount of heating-surface to the water.

It will be noticed that the end of the pre cipitate-pan is somewhat higher than the end and sides of the retarder-pans, and the sides incline downward until they are of the same height as the sides of the retarder-pans. This gradually-increased height of the sides and end of the precipitate-pan prevents the wa: ter overflowing at said sides and end,which it would do -if the sides and ends of all the pans were of the same height, and the series of pans are set slightly inclined toward one end.

Various modifications or changes may be made in the practice of my invention. For instance, instead of providing both retarderpans with wings but one may be so provided and its temperature so high thatthe precipitation at once takes place, freeing the water of all impurities. The water thus freed flows through the corrugations in the cap of the overflow and down into the water-space of the boiler. By opening the valvein the blowoif pipe the collected impurities may be from time to time blown off through said pipe.

Having thus fully described my invention, whatI claim as new, and desire to secure by Letters Patent, is

1. In aboiler-cleaner, the c0mbination,with the boiler and feed-water pipe, of a series of pans comprising one or more retard er-pans and a precipitate-pan continuously connected together, one or more of said retarder-pans provided with oppositely extending wings,

and the precipitate-pan provided with a blowoif pipe and having located in its bottom an overflow, substantially as specified.

2. In aboiler-cleaner, the combination,with the boiler and feed-water pipe, of a series of pans comprising one or more retarder-pans and a precipitate-pan continuously connected together, one or more of said retarder-pans provided with oppositely extending, wings, and the precipitate-pan provided with a blowoff pipe and having a walled opening in the bottom thereof, which serves as an overflow for the water, substantially as specified.

3. In aboiler-cleaner, the combination,with

the boiler and feed-water pipe, of a series of pans comprising one or more retard'er-pans and aprecipitate-pan continuously connected together, one or more of said retarder-p'ans provided with oppositelyextending wings, and the precipitate-pan provided with a blowofi pipe and having a walled opening in the bottom thereof, the wall being provided with an inwardly-extending cap-piece,whereby the overflow of water is prevented from flowing down the sides of said wall, substantially as specified.

4. In a boiler-cleaner, the coinbinatiomwith a feed-water pipe and a blow-off pipe, of a series of pans continuously connected together, one or more of said pans provided with oppositely-extending wings, and one of said pans with a walled opening in the bottom thereof, the wall being provided with an inwardlyextending corrugated cap-piece, whereby the water will be caused to flow through the channel portions of said cap and into the waterspace of the boiler without coming in contact with the sides of the wall, substantially as specified.

In testimony whereof I affix my signature in the presence of two witnesses.

IVILLIAM POLLEY.

Vv'itnesses;

JOHN W. SUGGETT, A. M. DUFFY. 

